Compact bone is made up of osteon systems. Spongy bone contains holes.

Identify and interpret the functions of the skeletal system.

The skeletal system provides a framework for the tissues of the body, produces blood cells, and stores minerals. It also protects internal organs and allows for efficient body movement.

Why would it be impossible for bones to grow from within?

The structure of compact bone would not allow growth from the inside.

Outline the steps involved in bone formation and growth—from cartilage to the cessation of bone growth.

(1) embryo skeleton is cartilage; (2) bone begins to replace cartilage- calcium salts and other ions are deposited and harden to form bone; (3) bones continue to grow in length from the ends, and in diameter from the outer surface until around age 20

one of two main parts of the human skeleton, includes the skull and the bones that support it, such as the vertebral column, ribs, and sternum.

axial skeleton

one of two main parts of the human skeleton, includes the bones of the arms and legs and associated structures, such as the shoulders and hip bones.

appendicular skeleton

point where two or more bones meet; can be fixed or facilitate movement of bones in relation to one another.

joint

tough band of connective tissue that attaches one bone to another

ligament

fluid-filled sac located between the bones that absorb shock and keep bones from rubbing against each other.